Machine for compressing corrugated pipes



'March 18, 1924. 1,486,976

B. J. LINDG'REN I MACHINE FOR COMPRESSING CORRUGATED PIPES Filed March 24. 1922 3 Sheets-Sheet March 18 1924. 1,486,976

B. J. LINDGREN MACHINE FOR COMPRESSING CORRUGATED PIPES Filed MarCh 24, 1922 3 Sheets-Sheet :52 v (A71 2 EM 21% M 1 March 18 1924.

B. J. LINDGREN MACHINE FOR COMPRESSING CORRUGATED PIPES Filed March 24. 1922 3 Sheets-Sheet 5 NN TY M Patented Mar. 18, 1.924.

UNITED STATES anon J. 'LINDGREN, or serum,

TOOL wonxs, or BUFFALO,

NEW YORK ASSIGNOR TO NIAGARA. MACHINE & NEW YORK, A CORPORATION OF NEW YORK.

MACHINE FOR COMPRESSING CORRUGATED PIPES.

Application filed March 24,

T 0 all whom it may concern:

Be it known that I, BROR J. LINDGREN, a citizen of the United States, residin in the city of Buifalo, in the county of rie and State of New York, have invented new and useful Improvements in Machines for Compressing Corrugated Pipes, of which the following is a specification.

This invention relates to a machine for endwise compressing a pipe which has previously been formed of a sheet of metal rolled intoa tube and provided with circumferential corrugations, this compressing operation being one of the steps for converting a sheet of metal into a stove pipe elbow or similar article- The object of this invention is the pro-. duction of a machine whereby pipes of this character may be compressed properly and expeditiously and with a minimum expenditure of labor and power and which permits of using the main parts of the machine for compressing pipes of various diameters.

In the accompanying drawings:

Figure 1 is a top plan view, partly in section, of a compressing machine embodying my invention. Fig, 2 is a vertical longitudinal section of the same, showing the parts in position preparatory to compressing a pipe endwise. Fig. 3 is a similar view 7 showing the position of the parts after the or body of the chuck,

compression of a pipe has been completed. Fig. 4 is a fragmentary longitudinal section of the lower part of the chuck with a raised top part thereof in dotted lines and the up-' per section of the movable abutment or plunger swung into open or retracted position. Fig. 5 is a cross section taken on line 55, Fig, 1, and showing the chuck closed. Fig. '6 is a similar view but showing the chuck open. Fig. 7 is a fragmentary cross section on line 77, Fig. 1. Figs. 8 and 9 are fragmentary longitudinal sections of the mold the movable abutment or plunger and internal supporting member associated therewith showing the method of holding the pipe and compressing the same. Fig. 10 is a perspective view of one of the internal pipe supporting rings of the 1922. Serial No. .54e,4s2.

chuck. Fig. 11 is a similar view showing a pipe after the same has been compressed by my improved machine.

Similar characters of reference refer to like parts throughout the several views,

The pipe 20 which is to be compressed endwise by the machine of my invention is constructed of a sheet of metal which is first provided with corrugations .on its central part while its end portions are uncorrugated and then the same is rolled into the form of a tube so. that the corrugations 21 extend circumferentially around the pipe and its opposite ends 22 are of plain cylindrical or uncorrugated form, as shown in Fig. 2. The pipe in this form has its corrugations spread apart, as shown in Figs. 2 and 8 and the same is then subjected to the endwise compressing operation ofthe present machine whereby its corrugations are pressed or folded closely to each other, as shown in Figs, 3, 9 and 11, preparatory to bending the pipe into elbow shape.

My improved machine for compressing the pipe endwise is constructed as follows:

23 represents the main frame of the machine which may be of any suitable construction to support the several working parts. On one end of this frame is mounted the chuck which receives the pipe to be compressed. In its preferred form this chuck is so constructed that some partsof the machine may be used for, endwise compressing pipes of different length and diameter and thus avoid the expense which otherwise would be involved and a corresponding increase in space required if a complete machine were needed for each size of pipe. For this purpose a main mold or chuck body is permanently mounted on the main frame and adapted to form part of the chuck for compressing pipes of the largest diameter and the greatest length and supple mental mold or chuck bodles adapted to form parts of chucks for compressing pipes of smaller diameter and less length are 'pro.-

vided which may be mounted in the main chuck body and thus permit of using the,

main parts of the same machine for comsuit other parts of the machine with which it cooperates and for this purpose the lower body section 24 is provided on its opposite sides with laterally projecting lugs-26 which rest on the upper horizontal; face 27 of the frame and receive fastenin bolts 28 which pass through longitudinal s ots 29in the upper part of the frameyas shown 1n Figs. 1, 5 and 6; Longitudinal adjustment of the mold or bod of the main chuck is efi'ected by a horizontal adjusting screw 30 journaled in a bearing 31 on the main frame but held against longitudinal movement thereln and engaging its inner end witha threaded opening 32 formed in a lug 33 dependlng from the underside of the mold section 24, while its outer end is provided with a handle 34 for turning. this screw, as shown in Flg. 2. The upper section 25 of the body or mold of the main chuck is preferably pivotally connected at one of its longitudinal edges with the corresponding edge of the companion lower section 24 by hinges 35 so that this upper section can swing vertically toward and from the lower section for opening and closing the mold of the chuck. The upper mold section may be locked in its closed position by a fastening device which in its preferred form comprises two locking lugs 36 arranged on the lower mold section 24 adjacent to the ends of that longi-- tudinal edge thereof opposite to the'hinges 35 and forming downwardly facing shoulders, two upright bifurcated catches 37 each having a hook 38 at its lower end adapted to engage the underside of one of said locking lugs, two vertically swinging elbow levers pivoted on the free longitudinal edge of the upper mold section 25 and each having an upright upper arm 39 upon which the upper end of one of the catches is pivoted and a lowerhorizontal arm 40 which projects outwardly and which is connected by a handle 41 with the corresponding arm of the other elbow lever so that both catches may be opened and closed in unison. In operation the catches engage automatically with the locking lugs when lowering the upper mold section 24 upon the lower mold section 25 and upon raising the handle 41'the upper arms of the elbow levers swinging inwardly together with the upper ends of the catches whereby .form of a horizontal cy the intermediate arts of the latter are caused to turn on t e adjacent surface of the upper mold section 25 as a fulcrum and move outwardly at their lower ends so that the Fooksf-therefore disengage from the locking Til the present instance the mold or body of the mam chuck is not used for compressing a pipe endwise but serves as an outer support for the mold or body of an inner or supplemental chuck of smaller size designed to compress a pipe which is shorter and of smaller diameter. This inner or supplemental chuck bod or mold has the hnder which is divided lengthwise into lower and upper semic lindrical sections 42, 43 which fit against tlie inner side or bore of the corresponding sections of the outer or main body sections and are detachably connected therewith by screws 44, as shown in Figs. 1, 2, 3 and 4, or

otherwise. Adjacent to the front ends of the outer mold sections 24, 25 the same are provided with inwardly facing annular shoulders 50 which are engaged by the adjacent outer ends of the inner mold sections 42, 43, as shown in Figs. 2, 3 and 4, and adjacent to their outer ends the inner mold sections are provided in the bore thereof with inwar ly facing annular shoulders 45. Against the latter is fitted a longitudinally immovable abutment rin which engages with the adjacent enlarge part of the bore of the inner mold or body and is split axially so that the same is divided into lower and upper sections 47, 48 which are detachably secured by screws 49 to the lower and upper sect-ions 42, 43 of the inner mold and are provided with; an inwardly facing shoulder 46.

Within the rear end of the inner mold is arranged a movable abutment head or plunger which is recessed on its inner side so as to form an inwardly facing shoulder or abutment 52. This plunger is of cylindrical form to fit the bore of the inner mold and the same is divided to form a lower section 53 which is only capable of a longitudinal movement and an upper section 54 which is pivotally connected by a pin 55 to the lower section so that the same is capable not only of moving lengthwise with the lower' section 53 but also swinging vertically relatively thereto to permit of introducing the ipe to be compressed to this plunger as we as removing the same therefrom.

During the operation of endwise oompressing a pipe the uncorrugated end portions thereof are preferably supported against being displaced inwardly under the endwise pressure against the same by placing within each of the ends of the pipe a supporting ring 56 so that the same are flush with the ends of the pipe. The rings are placed in the pipe before the latter is upper ammo and thereafter the uncompressed pipe is placed with its lower half into the lower section of the supplemental mold or body of; the chuck so that its corrugated central part is arranged between the abutment ring and the abutment plunger and the lower half of one of HS uncorrugated ends engages the lower half of the recess in the plunger and the lower half of its opposite uncorrugated end engages the inner enlarged part of the bore of the abutment ring.

The upper section of the abutment plunger is now swung downwardly so that its portion of the plun er recess also engages the upper portion 0 the respective end of the pipe and this end of the pipe is confined within the recess of the plunger. The upper half of the outer and inner molds are now lowered so that the central part of the upper section of the supplemental mold encloses the upper half of the corrugated part. of the pipe and one end of this mold embraces the put in the machine of the abutment ring engages the upper half of the other end of the pipe, as shown in Figs. 2 and 8. The plunger 15 now moved forwardl while the ends of the pipe are securely lleld against inward displacement, whereby the circumferential corrugations on the central 'part are pressed together from the spread condition of the same shown in Figs. 2 and 8, to the closely folded condition, shown in Figs. 3 and 9, which is attended by a corresponding shortening of the pipe. The plunger is next moved to its retracted position, and the upper half of the mold is raised to permit of removing the com ressed pipe, from the lower half of the mdld and thering and plunger abutments. After the pipe is removed from the machine the internal supporting rings are detached therefrom and inserted in another uncompressed pipe preparatory to compressing the same in the manner described.

During the operation of raising and lowering the upper section of the mold its weight is preferably counterbalanced by a counterweight which may consist of two arms 57 projecting laterally .from the hinged side of the upper mold section and each having one or more weights 58 adjustably secured thereto by a screw 59. The opening movement of the upper half of the mold is preferably arrested when this half has made substantially a quarter turn, this bein preferably accomplished by a stop 60 aving the form of an upright bar secured at its lower end to the main frame while its upper end is arranged in a position to be engaged by the outer side of the upper mold section, v

as shown in Fig. 6.

When a pipe of largest diameter and greatest length within the capacity of the machine is to be compressed 'endwise the half of the plunger and the upper half shoulders 45 thereof, and a plunger corre-- sponding to that used in the smaller mold but of a larger size is substituted therefor and placed within the opposite end ofthe largkr or main mold. When thus; fitted wit a larger abutment ring and a larger abutment plunger the main mold sections form'the main elements for enclosing and compressing a large pipe endwise, it being understood that internal supporting rings 56 of correspondingly increased diameter are employed when operating on pipes of the larger size.

Any suitable means may be employed for reciprocating the longitudinally movable plunger or abutment in the mold which means are however preferably constructed as shown in Figs. 1, 2 and 3. As there shown the same comprise a driving shaft 61 journaled transversely in hearings on the upper part of the main frame and provided with a crank 62, a connecting rod 63 pivotally connected at one end with said crank, a longitudinally reciprocating slide or carriage 64 guided in ways 80 on the main frame and pivotally connected on its rear side with the opposite end of said connecting rod, and a longitudinal shifting rod 65 which is connected at its rear end with said slide and at its front end with said plunger 53, 54. The rear end of the shifting rod is preferably detachably connected with the slide by providing this rod near its rear end with a reduced neck 66 forming a head 67 at the end of the rod, and providing the front side of the slide with a correspondingly shaped socket which is formed between-a saddle 69 on the lower part of the slide and a detachable cap 70 secured to this saddle by screws 71, as shown in Figs. 2 and .7, or

is arranged in an opening 51 formed hori-' I zontally and centrally in the head of the lower section 53 of the compressor plunger, a forwardly facing shoulder 73 engaging with the outer side of this head, and. a collar 74 of larger diameter than the neck 68 secured to the front end thereof by a screw 75 and bearing against the front side of the plunger head. When a pipe of the greatest length is being compressed in the machine the neck 68 of the shifting rod isso fitted in the plunger that the same are mcapable of moving independently of each other but are compelled to move in unison, thereby imparting the maximum throw of the crank to the plunger and moving the latter lengthwise the requisite extent for op- (ill erating on the pipes of greatest length for which the machine is intended. When, however, shorter pipes are to be compressed inthe machine a connection between the shifting rod and the plunger is so fitted that a lost motion or slack connection is obtained between the same lengthwise of the path of these parts. This is preferably obtained by making the neck 68 of the shifting rod longer than the head of the respective plunger, as shown in Figs. 1, 2, 3 and 4: which produces a certain amount of dead movement in the shifting rod andonly transmit part of its movement to the plunger. The amount of this dead, slack or lost motion varies according to the length of the pipe which is being compressed and for this purpose a shifting rod and plunger having the requisite amount of longitudinal play between the same are rovided for each mold in which a definite ength of pipe is to be compressed In actual practice the diameter of the pipes usually increase in the same measure as the increase in length and a machine of this character therefore equipped with a plurality of sets of molds, abutment rings, plunger and shifting rods, any one set of which may be operated in the machine for compressing pipes of a predetermined length and diameter.

As shown in the drawings the driving shaft may be operated by a counter shaft 76 journaled transversel in the lower part of the frame and provi ed at one end with a belt pulley 77 and connected at its other end by gear wheels 78, 7 9 with the driving shaft. This machine is preferably controlled so that the s'ame after being started performs a cycle of operations, the same is automatically stopped, each cycle including a forward and backward stroke of the plunger. For this purpose the driving shaft is provided with an automatic clutch 81 which is controlled. by a treadle 82 op eratively connected therewith in any suitable manner.

This machine aside from being very strong and durable in construction, permits of compressing pipes rapidly and without liability of producing defective work, thereby insuring a large capacity and economy in production.

I claim as my invention:

1. A machine of the character described comprising a chuck having a cylinder which is adapted to receive a circumferentially comprising a chuck having a cylindrical body which is adapted to receive a circumferentiall corrugated pipe, at relatively stationary a utment arranged in said body and adapted to be en aged by one endof the pipe and a mova le abutment adapted to engage with the exterior of the other end of said pipe and having a section which is movable longitudinally, and a section which is movable lengthwise with said first mentioned section and also capable of moving laterally rela tively thereto.

3. mach ne of the character described compr1sing a chuck having a cylindrical body which is adapted to receive a circumferentially corrugated pipe, a relatively statlonary abutment arranged in said body and adapted to be engaged by one end of the pipe, and a movable abutment adapted to engage with the other end of said pipe and having a section which is movable longitudinally,-and a section which is pivoted to the first mentioned section so as to be capable of swinging transversely relatively thereto.

4. A machine of the character described comprising a chuck having a cylindrical body which is adapted to receive a circum ferentially corrugated pipe and which is divided lengthwise into sections one, of which is normally fixed and the other movable laterally relative to the fixed section, said body being provided with a relatively stationary abutment which is adapted to engage one end of said pipe and which is divided lengthwise into sections one of which is arranged on the normally fixed section of-said body and the other arranged on the transversely movable section of the body, and a normally movable abutment adapted to engage the other end of said pipe and consisting of sections one of which is movable lengthwise only in the body and the other being pivoted to said longitudinally movable section so as to move lengthwise therewith and also capable of swinging transversely thereto.

5. A machine of the character described comprising a chuck having a cylindrical body which is adapted to receive a cirpumferentially corrugated pipe and which is divided lengthwise into sections one of which is normally fixed and the other movable laterally relative to the fixed section, said body being provided with a relatively stationary abutment which is adapted to engage one end of said pipe and which is divided lengthwise into sections one of which is arranged on the normally fixed section of said Joe use

other being pivoted to said longitudinally movable section so as' to move lengthwise therewith and also capable of swinging transversely thereto, and supporting rings adapted to be placed within the end portions of said pipe.

' body 6. A machine of the character described comprising a chuck having a cylindrical body which is adapted to. receive a circumferentially corrugated pipe and which is divided lengthwise into sections one of which is normally fixed and the other movable laterally relative to the fixed section, said body being provided with a relatively stationary abutment which is adapted to engage one end of said pipe and which is divided lengthwise into sections, one of which is arranged on the normally fixed section of said body and the other arranged on the transversely movable section of the body, and a normally movable abutment adapted to engage the other end of said pipe and consisting of sections one of which is movable lengthwise only in the body and the other being pivoted to said longitudinally movable section so as to move lengthwise therewith and also capable of swinging transversely thereto, said relatively fixed abutment being constructed in the form of a split ring and said body being provided with an Internal shoulder which is engaged by said splitring.

7. A machine of the character described comprising a chuck having a cylindrical body which is adapted to receive a circumferentially corrugated pipe and which is divided lengthwise into sections one of which is relatively stationary and the other pivotally connected at one of its 10 tudinal edges to the corresponding longitudinal edge of the relatively stationary section so as to be capable of swinging transversely thereto, coupling means for detachably connecting the opposite lo 'tudinal edges of the sections of said body, and abutments which are arranged within the body and adapted to engage with opposite ends of the pipe, one of said abutments bein relatively stationary and the other mova le lengthwise of the body, said coupling means comprising a shoulder arranged on the relatively stationary body section, a latch having a'hook adapted to engage said shoulder, and an elbow lever pivotedon the swinging body section and having one of its arms pivotally connected with said latch while the other arm thereof is provided with a handle.

8. A machine of the character described comprising a chuck having a cylindrical which is adapted to receive a circumferentially corrugated pipe, and which is divided lengthwise into sections one of which is relatively stationary and the other pivotally connected at one of its longitudinal edges to the corresponding longitudinal edge of the relatively stationary section so,

as to be capable of swinging transversely thereto, coupling means for detachably .conmeeting the opposite longitudinal edges of the sections of said body, abutments which are arranged within the bod and adapted,

to engage with opposite en s of the pipe,

one of said abutments being relatively stationary and the other movable lengthwise of the body, a main frame on which said body is movable lengthwise, and an adjusting device interposed and body for shiftin the latter lengthwise.

9. A machine of tie character described comprising a chuck having a cylindrical body which is adapted to receive a circumferentially corrugated pipe and which is divided lengthwise into sections one of which is relatively stationary and theother pivotally connected at one of its longitudinal edges to the corresponding longitudinal edge of therelatively stationary section so as to be capable of swinging transversely thereto, coupling means for detachably connecting the opposite longitudinal edges of between said frame ing screw engaging said threaded opening,

and mounted on said frame so as to be capable of turning but held against lengthwise movement.

10. A machine of the character described comprising a chuck having inner and outer cylindrical bodies the outer one of which is adapted to be used alone when operating on pipes of the largest diameter and the inner body being supported within the outer body and adapted to receive pipes of a smaller diameter, each of said bodies being provided internally with an abutment immovable lengthwise for engaging one end of the pipe to be operated upon and a longitudinally movable abutment for engaging the oppos1te.end of the respective pipe.

11. A machine of the character described comprising a chuck having a cylindrical, body adapted to receive a circumferentially corrugated pipe, a lon itudinally immovable abutment arrange within the body and adapted to enga e with one end of the pipe, a longitudinall movable abutment cs3 v ee ee' engage with the other end of the pipe, e divided socket, a shifting rod provided at main frame on which the body is mounted, one end with wreduced neck which is seated at driving shaft journaled on the frame and in. said socket while its 0 posite end is re- 10 having a crank, a connecting rod connected duced and slides in said ongitudinal mov- 5 at one end with said crank, it slide 'moveble able abutment and is provided with shoul- 1 lengthwise on the frame and connected with dex's on opposite sides of this abutment.

the other end of said rod end having a BRQR J. LlNDGREN. 

